Natsume is at home early one evening when he hears a knock on the door.  He sees Tohko outside, asking to be let in.  But when he opens the door, there's nobody there, and a gust of wind rushes past.  Another Youkai is after the book of friends!
Sorry, but I can't.
Lo siento pero no lo puedo llamar.
Lo siento, pero no puedo hacerlo.
Desculpe, mas não posso.